Photo by: Matt Rourke
Police head across a street in State College, Pa., on Wednesday night, Nov. 9, 2011, as students gather after the Penn State board of trustees voted to fire football coach Joe Paterno and university President Graham Spanier. (AP Photo/Matt Rourke)

Robert Mueller’s special counsel investigation into Russian meddling in the 2016 election has cost $6.7 million during the first four and a half months of the probe. Click to see past independent counsel investigations guilty of racking up high bills.